66874425807 has 64 divisors (see below), whose sum is σ = 107868672000. Its totient is φ = 36044456448.

The previous prime is 66874425769. The next prime is 66874425817. The reversal of 66874425807 is 70852447866.

66874425807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66874425807 - 2⁶ = 66874425743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66874425817) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7709869 + ... + 7718537.

It is an arithmetic number, because the mean of its divisors is an integer number (1685448000).

Almost surely, 2^66874425807 is an apocalyptic number.

66874425807 is a deficient number, since it is larger than the sum of its proper divisors (40994246193).

66874425807 is a wasteful number, since it uses less digits than its factorization.

66874425807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9000.

The product of its (nonzero) digits is 18063360, while the sum is 57.

The spelling of 66874425807 in words is "sixty-six billion, eight hundred seventy-four million, four hundred twenty-five thousand, eight hundred seven".